Made available in DSpace on 2015-05-14T12:36:55Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 2141642 bytes, checksum: c8c8d7a9c0ea40b4a1ad5f10de888b74 (MD5) Previous issue date: 2010-03-04 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / In the Brazilian scenario, the development of hardware components through computational methodologies and tools, available at affordable costs to education and research centers have make it feasible to design blocks and integrated circuit modules up to intellectual property IP level, focusing strategic areas of industry, specially those dedicated to the components for the Brazilian Digital Television System (SBTVD). This work deals with the architectural proposal development and validation for the Transport Stream MPEG-2 TS Subsystem of SBTVD transport stream demultiplexer from its specification and high-level modeling to its technology mapping implementation. As specific results, the structural and functional requirements of Transport Stream Subsystem MPEG-2 TS are detailed, the development of a software model for the demultiplexer and of an environment containing MPEG-2 TS flows that can validate the compliance with the SBTVD specification of models, an RTL-level MPEG-2 TS demultiplexer IP conceptual proof implementation and validation and its prototyping with technology mapping for FPGA and an ASIC design kit , are also presented. / No cenário brasileiro, o desenvolvimento de componentes de hardware através de metodologias e ferramentas computacionais, disponibilizados a custos acessíveis a centros de ensino e pesquisa tornou factível a possibilidade de se projetar até o nível de propriedade intelectual IP, blocos e módulos de circuitos integrados para atender áreas estratégicas da indústria, em especial aquelas voltadas aos componentes de produtos aderentes ao Sistema Brasileiro de Televisão Digital (SBTVD). Este trabalho trata o desenvolvimento e validação de uma proposta arquitetural para o Subsistema de Fluxo de Transporte MPEG-2 TS demultiplexador de fluxo de transporte do SBTVD, desde sua especificação e modelagem em alto-nível, até sua implementação no nível de mapeamento tecnológico. Também estão apresentados resultados específicos como o detalhamento dos requisitos estruturais e funcionais do Subsistema de Fluxo de Transporte MPEG-2 TS, o desenvolvimento de um modelo em software para o demultiplexador e de um ambiente contendo fluxos MPEG-2 TS capazes de validar a conformidade dos modelos com a especificação do SBTVD, a implementação e validação de uma prova de conceito para um demultiplexador MPEG-2 TS no nível RTL e sua prototipagem com mapeamento tecnológico para FPGA e para um design kit de ASIC.

The Internet today is experiencing a large growth in the amount of traffic due to the number of users consuming streaming media. For both the operator and content providers, streaming of media generates most of its revenue through advertisements inserted in the content. One common approach is to pre-stitched (i.e. insert) advertisements into the content. Another approach is dynamic advertisement insertion, which inserts advertisements at run-time while the media is being streamed. Dynamic advertisement insertion gives operators the flexibility to insert advertisements based on context, such as the user's geographic location or the user's preferences. Developing a technique to successfully insert advertisements dynamically into the streaming media has several challenges, such as maintaining synchronization of the media, choosing the appropriate transport format for media delivery, and finding a splicing boundary that starts with a key frame. The details of these challenges are detailed in this thesis. We carried out extensive research to find the best transport format for delivery of media and we studied prior work in an effort to find an appropriate streaming solution to perform dynamic advertisement insertion. Based upon this research and our study of prior work we identify the best transport format for delivery of media chunks, then propose, implement, and evaluate a technique for advertisement insertion. / Idag har internet mycket trafik på grund av att alltfler servrar erbjuder högkvalitativa videon som strömmas till internetanvändare. Både för operatörer och leverantörer av sådan innehåll genererar direktuppspelning mest intäkter genom annonser som lagts till i videon. Det är väldigt vanligt att lägga till annonser i videon genom att sy in dem i videofiler. En annan metod är att lägga till annonser dynamiskt. Det betyder att resulterande videofilen genereras medan den blir strömmad till användare. Att sätta in annonser dynamiskt har som fördel för operatörer att välja reklam beroende på kontexten, såsom användarens position eller preferenser. Det är utmanande att utveckla den teknik som krävs för att kunna sätta in annonser dynamiskt i strömmade videofiler. Till exempel är det viktigt att tänka på följande: synkronisering av strömmad innehåll, val av lämplig transportformat för videoleveransen och gränsen för skarvning (så kallad splicing boundary). Detaljerna kring denna teknik finns i denna avhandling. Vi har forskat på att hitta det bästa transportformatet för videoleverans och vi har studerat relevant arbete som gjorts tidigare för att hitta en lämplig mekanism för dynamisk annonsinsättning. Baserat på vår forskning och studerande av tidigare arbeten har vi klassificerat det bästa formatet för leveransen av videostycken, implementerat och evaluerat en teknik för annonsinlägg.

Master's thesis compares the standard for digital terrestrial television broadcasting of the first generation DVB-T/H and the second generation DVB-T2 with particular emphasis on the modulator, a security channel interference, the signal from the transmitting environment itself and the modulation signal. The following description of specific models of transmission channels for fixed, portable and mobile reception of digital terrestrial signal. Comparison with the particular relates of the transmission parameters for different types of reception of digital terrestrial television with achieving efficiency and effectiveness of transmission at the level of laboratory measurements and computer simulation.